| 摘要 |
<p>Binoculars are provided with a pair of barrels, each of which holds a telescopic optical system comprised of an objective lens and an eyepiece in its inside, a reticle set to be movable along an optical axis of one of the telescopic optical systems between the objective lens and the eyepiece of the one of the telescopic optical systems, an adjusting ring that moves the reticle along the optical axis by rotational operation to adjust a position of the reticle in the optical axis direction.</p> |
